Boost to ECU

I'm rebuilding the engine in my 2000 v6 Mustang to the internals from a Thunderbird SupCoupe so I can run about 13# of boost on twin turbos. So, now you know the plan and the reason why, here's the question. How do I get my ECU to read, and in-turn publish that information to my carputer. I still don't know if I'm going to go with an android-based interface or an actual PC, and I know that plays a role in the publishing of the boost/vac data, but I need some help on how to get that information to my display. Any help?

Boost is not measured in the 2000 mustang computer, so you cannot poll it as a PID for outputs, however, if tuned correctly it will register over 100% load, and that can be used to know when you are into boost. (to a point 100% load is typically around 1 pound of boost on a setup like that, but Load is VE, so anything that makes the motor more efficient will increase load)

let me know your results once you get it running, what tuning software do you plan on using?

A friend had twin turbos on his 2000 V6 back in the day, made good power and hit a 10.99 at the track.

that's not what I wanted to hear. I need a real-time view of actual boost, and id rather not pay $100+ for a dumb gauge and wire it, particularly when I plan on making everything digital. is there software that will pick that info up and integrate that with the data its getting from the ecu?

I definitely will let you know. I'm rather new run fact the biggest job id done before buying my 'stang in may was replacing a tie rod from hitting a curb in snow. I've got a fast learning-curve, I assume, since I've already rebuilt the engine, but the only software im aware of that seems even close to complete is megasquirt. I'm a big fan of having access to the data myself and not spending $1k on a tune when I need it so im not planning on having it taken to a shop for that. as far as a GUI, though, im open for suggestion because I was only aware of torque on android until a matter of hours ago.

im not shooting for super power. I want a tad bit of reliabilty so im aiming for sub-400 horse. the twin set-up is because two t3/t4s have the perfect map at 10-15psi and I like the idea of having a quick-spool on this low-torque-lacking motor.

It seems you have to make a choice. Watch your engine blow on OBD2 or use a decent aftermarket ecu that keeps the engine alive.
That does mean that you probably end up with something that is illegal to use on the road in the USA, but can be used on race tracks.

Whatever you choose, you need to make a setup on a rolling road with a lot of equipment attached - knock detection, afr measurement, etc.

My gurus have gone to Delco - Delco did the big spend years ago and feature all the bits - turbo, super etc - they just need to be enabled (AFAIK).
There are a few forums that deal with Delco mods & hacking. (One I know of doesn't have the brightest kids on the block, but have good $bins (maps) and other reference material.)
And there are tools to display what it is doing in real-time.

Otherwise if OBD can be added to the Megasquirt, though isn't its core code protected? - that may make hacking difficult. (Back in its "DIY EFI" days, it was open.)

But depending on what you want to know (and why), it should be possible to monitor what's happening. (IE - anything that can be sensed. What else is there - the code & the maps should be known, and any auto-tuning (re-mapping) can be monitored.)